DataMuseum.dk Presents historical artifacts from the history of: Rational R1000/400

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⟦b3f9a4385⟧ Ada Source

    Length: 3072 (0xc00)
    Types: Ada Source
    Notes: 03_class, FILE, R1k_Segment, e3_tag, package body Fifo, seg_0254a4, seg_026cd3

Derivation

└─⟦8527c1e9b⟧ Bits:30000544 8mm tape, Rational 1000, Arrival backup of disks in PAM's R1000
    └─⟦5a81ac88f⟧ »Space Info Vol 1« 
        └─⟦this⟧ 
└─⟦8527c1e9b⟧ Bits:30000544 8mm tape, Rational 1000, Arrival backup of disks in PAM's R1000
    └─⟦cfc2e13cd⟧ »Space Info Vol 2« 
        └─⟦this⟧ 

package body Fifo is

    Tab : array (1 .. Size) of Element;
    Head, Tail : Positive := 1;


    procedure Clear is
    begin
        Head := 1;
        Tail := 1;
    end Clear;


    function Is_Empty return Boolean is
    begin
        return Head = Tail;
    end Is_Empty;


    function Is_Full return Boolean is
    begin
        return Tail + 1 mod Size = Head;
    end Is_Full;


    procedure Get (Item : out Element) is
    begin
        Item := Tab (Head);
        if Head = Size then
            Head := 1;
        else
            Head := Head + 1;
        end if;
    end Get;


    procedure Put (Item : in Element) is
    begin
        Tab (Tail) := Item;
        if Tail = Size then
            Tail := 1;
        else
            Tail := Tail + 1;
        end if;
    end Put;

end Fifo;

    nblk1=2
    nid=2
    hdr6=2
        [0x00] rec0=31 rec1=00 rec2=01 rec3=000
        [0x01] rec0=30 rec1=00 rec2=02 rec3=001
    tail 0x2151f828083a250c393b2 0x42a00088462060003
Free Block Chain:
  0x2: 0000  00 00 03 6a 00 17 20 20 20 20 20 20 20 20 20 20  ┆   j            ┆